Date Column Automations

Hi there! I currently have an automation to set the start date of the project as the day the item is created. I would like to have the end date of the project be 3 months from the start date in a separate date column. Is there a way to do this that doesn’t involve formulas? I’ll need this information to get carried over into another board and I know Monday formulas aren’t compatible with automations. Thanks!

Add a date column as ‘end date’. Create automation that when item is created, set ‘End Date’ to today’ and then push ‘End Date’ by 90 days.